HP XP P9500 Storage - Manual (Page 583)

5. From the local site, execute the YKRESYNC DELTAJNL command for the local-to-remote
EXCTG.
•
YKQUERY
•
YKRESYNC DELTAJNL
•
YKEWAIT GOTO(DUPLEX)
When command execution succeeds, the status of the primary-to-remote Cnt Ac-J Z copy pair
automatically changes to HOLD (Delta Resync pair).
Operation in a 4x4x4 Delta Resync configuration that originates from the local site starts.
Failback
1. Recover the primary site host from the failure.
2. Stop operation at the local site.
Using a 4x4x4 Delta Resync configuration 583